Push switch



Patented` Sept. `14, 19426.

UNITED sTATEs PATENTjoFFlcE.

.ABVID H; NERO, OF'NEW BRITAIN, CONNECTICUT, ASSIGNOR TO THE ARROW-ELEC- T'RIC COMPANY, OF HARTFORD, CONNECTICUT, .A CORPORATION` OF CONNECTICUT.

.'P'USH SWITCH.

Application med may 1o,

My invention relates to v electric push switches, the object of my invention being to provide a simple, strong and'quick-actling mechanism with a long break such as will qualify it for use in hand drills and other electric implements in which heavy currents are used.

In Figs. 1, 2, '3 and 4 I have illustrated one form of my mechanism as applied to a push switch, the device being installed in a tubular tool handle in Figs. l, 2 and 4, while in Fig. 5 I have illustrated a modification thereof.

Fig. 1 is alongitudinal partial section,

Fig. 2 is a similar view at the instant when the slide barI is about to be released,

Fig. 3 is a horizontal section through line 3-3 of Fig. 1 showing the contacts,

' Fig. 4 is an end view,

Fig. 5 is a vertical section similar to Fig. 1 showing a modified form of my mechanism. The main frame 1 is in the shape of a deep narrow box and has slots 2 in its ends. The sides of the box are closed by plates 3 of insulating material and extend beyond the ends of the box. Mounted near one end of the sides 3 are the'stationary contacts 4 and their binding screws 5.

A contact-carrying slide bar 6 is guided-in the slots 2 in the frame ends, and on the 'extended ,end of this slide bar is mounted a double contact 7 to make electrical connection between the stationary contacts4, the double contact 7 being insulated from the slide bar at 7. The slide bar has a longitudinal slot 8 extending part of the distance between the frame ends. Fastened on the slide bar by pins 8 moving in the slot 8 are cupped washers 9, and between these washers 1s located the spiral compression spring 10. Bridging the compression spring 10 and washers 9 is the yoke 11. The handle 12 on the top of the switch is fastened to this oke through slot 13 in the top of the frame.

'2 y these means the 4tudinally. l In the mechanism shown .in Figs. 1, 2, 3 'and 4 thevslide bar 6 has notches 14, 15, on its lower edge beyond each end ofthe frame. V .A detent bar 16 plays in slots 17 in the frame just below-the slide bar.' This detent bar `is heldfrom longitudinal movement by its not ches -18, 19,' catching; on vthe parts 20 of the ends offthe frame. The detent bar 16 l has at its opposite ends lugs 21 one or'other yoke can be. moved longi- 1921. serial No. 468,365.

^they are free to move-as, for example, in

the direction of the arrow Fig. 1.` The rear end of the 4 yoke 11 then compresses the spring 10 against its forward washer 9; 70

'Meanwhile lthe forward arm of the yoke passes onto the cam face 23, whereby the detent bar is depressed until its forward end is pushed out of the notch 15 as indicated in Fig. 2. The slide bar, vthus released, will, under the pressure of thespring 10, jump to the other extreme of its movement carrying the moving 'contact 7 with itand breaking the circuit at the contacts. Spring 22 will press the rear lug ofthe detent bar into the notch 14 in the slide bar, thus locking the switch in its new position. Thel movement in a reverse direction is exactly similar.

In the modification shown in Fig. 5 the frame acts as a detent, thus dispensing with the separatedetent bar. 'In this modification the slide bar hastwo .lugs 24, 25 and cam surfaces 26, 27. In the position shown in Fig; 5 the lug 25 bears against the inside of the frame end and spring 22 bears against the slide bar 6. The a'ction is similar to that already described. As yoke 11 moves forward its leading arm slides on cam surface ed to transmit pressure exerted upon one washer to the other, in combination' with 105 means for applyingpressure to the washers separately,l said Ieans .including a yoke straddling the tworwash/ers. I

'2. In a ush' switch a notched slide bar having .a` ongitudinal slot, washers upon fit .saidy slide bar whose movement upon the bar is restricted by the slot, and a single compression spring between said washers adapted to. transmit pressure exerted upon one washer to the other, in combination with means for applying pressure to the washers separately, said. means including a yoke straddling the two washers, and a springsupported rigid detent bar adapted to hold said notched slide bar against motion by engaging with its notches.

3. In a push switch a notched slide bar having a` longitudinal slot, washers uponk said slide bar whose movement upon lthe bar is restricted by the slot, and a single commoving them, and extensions on said yoke adapted to move said detent bar against its supporting spring out of contact with the notched slide bar, substantially as described.

In testimony whereof I have signed my name to this specificati-on.

ARVID H. NERO. 

